[Elecraft] OT: High school drafting class, ~1975
Mark Musick
markmusick at outlook.com
Mon Apr 26 17:33:30 EDT 2021
OK, I can't resist any longer either.
I waited and bought the HP-45 when it came out. It had hyperbolic functions as well as polar to rectangular conversion functions. Being a EE the polar to rectangular conversion is why I bought it. It made life much easier. Of course my dad had a fit when he found out what I paid for it.
Now to the computers, how many of you youngsters out there remember core memory? For you really young folks there was no RAM. 0s and 1s were stored on toroidal cores on a back plane.
IN 1978, when I started at Public Service Company of Indiana (PSI), the local electric utility, we were using two 16 bit MODCOMP minicomputers. Each minicomputer had 64K of core memory for the supervisory control and data acquisition (SCADA) system. Each machine had a tape drive and two 360k disk drives. We thought we were downtown. The SCADA system was used to control and monitor the HV transmission system. 69kV - 765kV.
73,
Mark, WB9CIF
-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of MIKE ZANE
Sent: Monday, April 26, 2021 21:13
To: Bill Frantz <frantz at pwpconsult.com>; elecraft at mailman.qth.net
Subject: Re: [Elecraft] OT: High school drafting class, ~1975
What the heck are all those things you guys are talking about? Mike n6zw
> On 04/26/2021 11:18 AM Bill Frantz <frantz at pwpconsult.com> wrote:
>
>
> OK, I can't resist any longer.
>
> On 4/26/21 at 11:33 AM, lawresh at woh.rr.com (SteveL) wrote:
>
> >Who carried around a CRC book of tables of various calculations in lieu of an unaffordable scientific calculator?
> Yup.
>
> >Or programming FORTRAN on punch cards?
> Yup. At first on a IBM 650 with a 4 pass compiler, intermediate
> storage on punch cards.
>
> >Or PDP-8 on paper tape after toggling in the boot loader through the front panel switches?
> Sorry, mine was a Varian 620/i (8K of 16 bit words) used for nodes in
> a circuit switched data network (Tymnet). :-)
>
> 73 Bill AE6JV
>
> ---------------------------------------------------------------------------
> Bill Frantz | Re IOT: "How many access control systems
> does it take
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